Meningitis, pneumonitis, and arthritis caused by Neisseria meningitidis group Y.

Neisseria meningitidis subgroup Y, although commonly isolated from the nasopharynx, rarely has caused meningitis in nonmilitary individuals. Meningococcus (serogroup Y) caused pneumonitis, meningitis, and arthritis in a previously healthy woman. Findings from examination of spinal fluid were minimal, but the clinical aspects of the illness were similar to those seen with other meningococcal serotypes.